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Finding the Fourth Proportional to 66,164.78, 99,236.75 and 54,991.86

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Solution

The fourth proportional to 66,164.78, 99,236.75 and 54,991.86 is: 82,479.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,164.78 : 99,236.75 = 54,991.86 : x
  2. Step 2: Convert to fraction form
    66,164.78/99,236.75 = 54,991.86/x
  3. Step 3: Cross multiply
    66,164.78x = 99,236.75 × 54,991.86
  4. Step 4: Simplify right side
    66,164.78x = 5,457,213,233.97
  5. Step 5: Solve for x
    x = 5,457,213,233.97/66,164.78
  6. Step 6: Final answer
    x = 82,479.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.